Power supply controller and docking station equipment

Abstract

The utility model discloses a power supply controller, which comprises a voltage acquisition module, a power supply selection module and a voltage reduction module, and is characterized in that the voltage acquisition module is respectively and electrically connected with an input power supply and the power supply selection module and is used for acquiring the voltage of the input power supply and outputting the acquired voltage value to the power supply selection module; the power supply selection module is electrically connected with the voltage reduction module and is used for outputting the input power supply to the voltage reduction module when the acquired voltage value is higher than a preset value; the voltage reduction module is electrically connected with an external system and is used for reducing the voltage of the input power supply and then outputting the voltage to the external system for power supply; and the power supply selection module is also used for outputting the input power supply to the external system to supply power when the acquired voltage value is not higher than the preset value. Stable voltage can be output no matter in a charging state or not, and stable work of an external system is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to electronic technical field especially relates to a power supply controller and docking station equipment. BACKGROUND

[0002] Docking station equipment is also called port duplicator, which is a kind of external equipment specially designed for terminal such as notebook computer. Through duplicating or even expanding the port of notebook computer, notebook computer is connected with multiple accessories or external equipment (such as power adapter, network cable, mouse, external keyboard, printer and external display, etc.) in one station.

[0003] At present, the docking station equipment on the market generally has charging function, when the docking station equipment is charging, the power supply provided by the charger is mainly used to power the internal circuit modules, and the power supply voltage is generally 5V-20V, and the internal circuit modules of the docking station equipment need stable 5V power supply to maintain work, so when the docking station equipment is charging, the internal circuit modules will appear unstable work. And it can be seen that at present, a power supply controller is urgently needed, which can realize stable work whether the docking station equipment is in charging state or not. UTILITARY MODEL CONTENT

[0004] The utility model embodiment provides a kind of power supply controller, can realize whether it is in charging state or not, it can output stable voltage, ensure that external system stable work.

[0005] In one aspect, the utility model embodiment provides a kind of power supply controller, and the power supply controller includes voltage acquisition module, power supply selection module, voltage step-down module, wherein:

[0006] The voltage acquisition module is electrically connected with input power supply and the power supply selection module respectively, for collecting the voltage of the input power supply, and the acquisition voltage value is output to the power supply selection module;

[0007] The power supply selection module is electrically connected with the voltage step-down module, for when the acquisition voltage value is higher than preset value, the input power supply is output to the voltage step-down module;

[0008] The voltage step-down module is electrically connected with external system, for the voltage of the input power supply is output to the external system after voltage reduction processing;

[0009] The power supply selection module is also used to when the acquisition voltage value is not higher than the preset value, the input power supply is output to the external system for power supply.

[0010] Optionally, the voltage acquisition module comprises a first resistor and a second resistor, one end of the first resistor is electrically connected with the input power supply, the other end of the first resistor is connected with one end of the second resistor, and the other end of the second resistor is grounded.

[0011] Optionally, the first resistor and / or the second resistor is a variable resistor.

[0012] Optionally, the power supply selection module comprises a third resistor, a fourth resistor, a first triode and a second triode, the emitter of the first triode, one end of the third resistor and the source of the second triode are electrically connected with the input power supply, the base of the first triode is connected between the first resistor and the second resistor, the collector of the first triode is connected with the other end of the third resistor, one end of the fourth resistor and the gate of the second triode respectively, the other end of the fourth resistor is grounded, and the drain of the second triode is electrically connected with the external system.

[0013] Optionally, the voltage reduction module is electrically connected with the collector of the first triode, the gate of the second triode and the input power supply respectively.

[0014] Optionally, the first triode is a PNP triode.

[0015] Optionally, the second triode is a PMOS triode.

[0016] Optionally, the preset value is 5.4V.

[0017] Optionally, the voltage reduction module is a DC-DC voltage reduction module, an LDO voltage reduction module or a BUCK-BOOST voltage reduction module.

[0018] In another aspect, the utility model further provides an expansion dock device, the expansion dock device comprises an input power supply interface, an external system and the power supply controller of any one of the above-mentioned embodiments, and the power supply controller is electrically connected with the input power supply through the input power supply interface.

[0019] As can be seen from the above, the utility model can acquire the voltage value of the input power supply, when the acquired voltage value is higher than the preset value, the input power supply is reduced in voltage and then output to the external power supply system, when the acquired voltage value is not higher than the preset value, the input power supply is output to the external system for power supply, so that stable voltage can be output whether in the charging state or not, and the stable work of the external system is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description, obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0021] Figure 1 is a structural schematic diagram of a power supply controller provided by the embodiments of the present application;

[0022] Figure 2 is a structural schematic diagram of another power supply controller provided by the embodiments of the present application;

[0023] Figure 3 is a structural schematic diagram of a docking station device provided by the embodiments of the present application.

[0024] Reference signs:

[0025] 11-input power supply, 12-power supply controller, 13-external system, 121-voltage acquisition module, 122-power supply selection module, 123-voltage step-down module, 14-input power supply interface. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application, obviously, the described embodiments are only some embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the present application.

[0027] Please refer to Figure 1 , Figure 1It is a kind of power controller's structural schematic diagram provided in the utility model embodiment. As shown in the power controller 12, it includes voltage acquisition module 121, power selection module 122, voltage step-down module 123, wherein, the voltage acquisition module 121 is electrically connected with input power and the power selection module 122 respectively, for collecting the voltage of the input power 11, and the acquisition voltage value is output to the power selection module 122, the power selection module 122 is electrically connected with the voltage step-down module 123, for when the acquisition voltage value is higher than preset value, the input power 11 is output to the voltage step-down module 123, the voltage step-down module 123 is electrically connected with external system 13, for the voltage of the input power 11 is reduced and is exported to the external system 13 power supply, the power selection module 122 is also used for when the acquisition voltage value is not higher than the preset value, the input power 11 is exported to the external system 13 power supply.

[0028] Please refer to Figure 2 The voltage acquisition module 121 in the embodiment includes first resistor R1 and second resistor R2, one end of the first resistor R1 is electrically connected with the input power 11, the other end of the first resistor R1 is connected with one end of the second resistor R2, the other end of the second resistor R2 is grounded. Wherein, the voltage between first resistor R1 and second resistor R2 is the point of the acquisition voltage, and the voltage of the point has a certain proportional relationship with the voltage of input power 11, and the proportional relationship can be set by setting the resistance value of first resistor R1 and second resistor R2, so as to indirectly detect the voltage of input power 11.

[0029] Further, the first resistor R1 and / or the second resistor R2 are variable resistors. The resistance values of the first resistor R1 and the second resistor R2 can be adjusted in real time, facilitating debugging operation.

[0030] Please refer to Figure 2 The power selection module 122 in the embodiment includes third resistor R3, fourth resistor R4, first triode Q1 and second triode Q2, the emitter of the first triode Q1, one end of the third resistor R3, the source of the second triode Q2 are electrically connected with the input power 11, the base of the first triode Q1 is connected between the first resistor R1 and the second resistor R2, the collector of the first triode Q1 is connected with the other end of the third resistor R3, one end of the fourth resistor R4, the gate of the second triode Q2 respectively, the other end of the fourth resistor R4 is grounded, the drain of the second triode Q2 is electrically connected with the external system 13.

[0031] The first transistor Q1 and the second transistor Q2 can realize switching of the power supply, and the third resistor R3 and the fourth resistor R4 can realize stable working of the external system during the switching of the power supply. Specifically, when the voltage collection module 121 collects the voltage of the input power supply 11 and the voltage is lower than a preset value, the voltage collected by the first resistor R1 is less than 0.7V, the base voltage of the first transistor Q1 is less than 0.7V, and the first transistor Q1 will not be turned on. At this time, the fourth resistor R4 is grounded, the second transistor Q2 is turned on, and the input power supply 11 is equivalent to a straight-through connection with the external system 13. When the voltage collection module 121 collects the voltage of the input power supply 11 and the voltage is higher than the preset value, the voltage collected by the first resistor R1 is greater than 0.7V, the base voltage of the first transistor Q1 is greater than 0.7V, and the first transistor Q1 is turned on. At this time, the gate voltage of the second transistor Q2 is equal to 0V, the second transistor Q2 is not turned on, and the input power supply 11 is output to the external system 13 after being processed by the voltage reduction module 123.

[0032] Further, the voltage reduction module 123 is electrically connected with the collector of the first transistor Q1, the gate of the second transistor Q2 and the input power supply 11 respectively.

[0033] Optionally, the first transistor Q1 is a PNP transistor.

[0034] Optionally, the second transistor Q2 is a PMOS transistor.

[0035] Optionally, the preset value is 5.4V, which is slightly higher than the general value 5V.

[0036] Optionally, the voltage reduction module 124 includes but is not limited to a DC-DC voltage reduction module, an LDO voltage reduction module or a BUCK-BOOST voltage reduction module, and other modules that can realize the same voltage reduction function, and the present embodiment does not exhaustively list them.

[0037] As can be seen from the above, the power supply controller provided in the present embodiment can collect the voltage of the input power supply, determine whether the device is in a charging state through the collected voltage, output the input power supply to the external system after processing by the voltage reduction module when the device is in the charging state, and output the input power supply directly to the external system when the device is not in the charging state, thereby ensuring stable working of the external system.

[0038] Please refer to Figure 3 , Figure 3It is a kind of structure schematic diagram of docking station equipment provided in the utility model embodiment, as shown in the drawing, the docking station equipment includes input power interface 14, external system 13, power controller 12, the external system is each circuit module in the docking station equipment, the power controller 12 is electrically connected with the input power 11 by the input power interface 14, and input power 11 can be charger such as charging head.

[0039] Specifically, the power controller 12 includes voltage acquisition module 121, power selection module 122, voltage step-down module 123, wherein the voltage acquisition module 121 is electrically connected with input power 11 and the power selection module 122 respectively, for collecting the voltage of input power 11, and outputting the collected voltage value to the power selection module 122, the power selection module 122 is electrically connected with the voltage step-down module 123, for outputting input power 11 to the voltage step-down module 123 when the collected voltage value is higher than the preset value, the voltage step-down module 123 is electrically connected with external system 13, for outputting to the external system 13 after voltage step-down processing of input power 11, the power selection module 122 is also used for outputting input power 11 to the external system 13 when the collected voltage value is not higher than the preset value.

[0040] In the embodiment, the voltage acquisition module 121 includes first resistor R1 and second resistor R2, one end of the first resistor R1 is electrically connected with the input power 11, the other end of the first resistor R1 is connected with one end of the second resistor R2, the other end of the second resistor R2 is grounded.

[0041] Further, the first resistor R1 and / or the second resistor R2 are variable resistors.

[0042] In the embodiment, the power selection module 122 includes third resistor R3, fourth resistor R4, first triode Q1 and second triode Q2, the emitter of the first triode Q1, one end of the third resistor R3, the source of the second triode Q2 are electrically connected with the input power 11, the base of the first triode Q1 is connected between the first resistor R1 and the second resistor R2, the collector of the first triode Q1 is connected with the other end of the third resistor R3, one end of the fourth resistor R4, the gate of the second triode Q2 respectively, the other end of the fourth resistor R4 is grounded, the drain of the second triode Q2 is electrically connected with the external system 13.

[0043] Further, the voltage step-down module 123 is electrically connected with the collector of the first triode Q1, the gate of the second triode Q2 and the input power 11 respectively.

[0044] Optionally, the first triode Q1 is a PNP triode.

[0045] Optionally, the second triode Q2 is a PMOS triode.

[0046] Optionally, the preset value is 5.4V, slightly higher than the general value 5V.

[0047] Optionally, the voltage reduction module 123 is a DC-DC reduction module, an LDO reduction module or a BUCK-BOOST step-up and step-down module, or other modules that can achieve the same reduction function, which is not exhaustive in the embodiment.

[0048] As can be seen from the above, the docking station device provided by the embodiment can collect the voltage of the input power supply, determine whether the device is in a charging state through the collected voltage, output the input power supply to an external system after step-down processing when the device is in a charging state, and not output the input power supply to the external system after step-down processing when the device is not in a charging state, thereby ensuring stable operation of the external system. That is, when the docking station device is not plugged into a charger, the power supply of the docking station device comes from an external device, and the power supply voltage is generally 5V. When the docking station device is plugged into a charger, the power supply of the docking station comes from the charger, and the power supply voltage is generally 5V-20V. The utility model takes the power supply voltage value as a monitoring point, directly supplies the power supply of the docking station device to each circuit module inside the docking station device when the power supply voltage is lower than 5V, and supplies the power supply of the docking station device to each circuit module inside the docking station device after the power supply voltage is converted to 5V when the power supply voltage is higher than 5V. It can be seen that the utility model can ensure the voltage stability of the power supply of the internal circuit module of the docking station when the power supply voltage is lower than 5V.

[0049] The above only discloses the preferred embodiment of the utility model, which is described in detail and specifically, and of course cannot limit the scope of the utility model, so the equivalent changes made according to the utility model claim still belong to the scope covered by the utility model. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the utility model, a number of modifications and improvements can be made, which all belong to the protection scope of the utility model.

Claims

1. A power supply controller, characterized by, The power supply controller comprises a voltage acquisition module, a power supply selection module and a voltage step-down module, wherein: The voltage acquisition module is electrically connected with the input power supply and the power supply selection module respectively, and is configured to acquire the voltage of the input power supply and output the acquired voltage value to the power supply selection module; The power supply selection module is electrically connected with the voltage step-down module, and is configured to output the input power supply to the voltage step-down module when the acquired voltage value is higher than a preset value; The voltage step-down module is electrically connected with an external system, and is configured to output the input power supply after voltage step-down processing to the external system for power supply; The power supply selection module is further configured to output the input power supply to the external system for power supply when the acquired voltage value is not higher than the preset value.

2. The power supply controller of claim 1, wherein, The voltage acquisition module comprises a first resistor and a second resistor, one end of the first resistor is electrically connected with the input power supply, the other end of the first resistor is connected with one end of the second resistor, and the other end of the second resistor is grounded.

3. The power supply controller of claim 2, wherein, The first resistor and / or the second resistor is a variable resistor.

4. The power supply controller of claim 2, wherein, The power supply selection module comprises a third resistor, a fourth resistor, a first triode and a second triode, the emitter of the first triode, one end of the third resistor and the source of the second triode are electrically connected with the input power supply, the base of the first triode is connected between the first resistor and the second resistor, the collector of the first triode is connected with the other end of the third resistor, one end of the fourth resistor and the gate of the second triode respectively, the other end of the fourth resistor is grounded, and the drain of the second triode is electrically connected with the external system.

5. The power supply controller of claim 4, wherein, The voltage step-down module is electrically connected with the collector of the first triode, the gate of the second triode and the input power supply respectively.

6. The power supply controller of claim 4, wherein, The first triode is a PNP triode.

7. The power supply controller of claim 4, wherein, The second triode is a PMOS triode.

8. The power supply controller of claim 1, wherein, The preset value is 5.4V.

9. The power supply controller of any one of claims 1-8, wherein, The voltage step-down module is a DC-DC step-down module, an LDO step-down module or a BUCK-BOOST step-up and step-down module.

10. A docking station device, comprising: The docking station device comprises an input power supply interface, an external system and the power supply controller according to any one of claims 1-9, and the power supply controller is electrically connected with the input power supply through the input power supply interface.

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